William h



(No Model.)

W. H. BRAY.

PACKING FOR GLASS GAGE TUBES.

No. 341,444. Patented May 11, 1886.

@einen STATES PATENT Ormea.

VILLIAM H. BRAY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDDANIEL H. HOW'ES, OF SAME PLACE.

PACKING FOR GLASS GAGE-TUBES.

PECIFCATION forming part of Letters Patent No. 341,444, dated May11,1886.

Application filed December 9, 1885.

.To all whom. t may concern:

Beit known that I,\VILLIAM H. BRAY, of Boston, in the county of Suffolk,State of Massachusetts, have invented a certain new and usefulImprovement in Devices for Packing Glass Gage-Tubes, of which thefollowing isa description sufficiently full, clear, and exact to enableany person skilled in the art or science to which said inventionappertains to make IO and use the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure lis a diagram showing my improved packing device; Fig. 2, avertical section of the plug detached; Fig. 3, a like view of thefollower detached; Fig. 4, a vertical section of the coupling detached;Fig. 5, a vertical section of the sleeve detached; Fig. 6, a verticalsection of the rubber packing-ring detached, and Fig. 7 a diagramshowing an ordinary device for packing glass gage-tubes.

Likeletters of reference indicate corres ponding parts in the differentfigures of the drawings.

My invention relates more especially to means for packing glassgage-tubes of steamboilers; and it consists ina novel construction andarrangement of the parts, as hereinafter more fully set forth andclaimed, by which a more eifective and desirable device of thischaracter is produced than is now in ordinary use.

In Fig. 7 of the drawings, Arepresents the cock; B, the nipple; C, thecoupling; D, the plug; E, the rubber packing-ring, andH the tube. Itwill be observed that the coupling is threaded interiorly its entirelength, and that the packing-ring restsvon the top of the nipple, andthe plug on the top of the packingring, so that when the plug is turnedin to pack the tube the packing-ring will be compressed and forcedoutwardly against the tube, and also into the threads of the coupling.This method of packing the tube has, however, been found to beobjectionable, for the reason that the heat hardens or vulcanizes therubber into the threads of the coupling, so that when it becomesnecessary to tighten up the packing it cannot be forced downwardly bythe plug. It also renders it difficult to de- Serial No. 185,204. (Nomodel.)

tach the coupling from the packing ring or the ring from the tube afterit has hardened,

.as described. My invention is designed to obviate this difficulty, andto that end I make use of -means which will be readily understood 5 5 byall conversant with such matters 'from the following explanation.

In Fig. l of the drawings, A represents the=` cock; B, the nipple; C,the coupling; D, the plug; E, the rubber packing-ring; H, the glass 6otube; J, the follower, and K the sleeve, the detachable parts, exceptingthe tube, being also respectively shown in section in Figs. 2,

3, 4, 5, and 6. The body of the coupling is turned out or enlarged toform the annular chamber x between the nipple and coupling, and fittedto work or slide vertically in said chamber there is a sleeve, K. Thepackingring E is'placed around the tube H, and rests on the top of thenipple B, and disposed on 7o the packing-ring and sleeve K there is anannular follower or disk, J, provided with a hole, m, for the tube H.The plug D, when screwed into the coupling, presses on the follower, andforces the packingring down onto the nipple and outwardly against thetube H and sleeve K, thereby packing the tube, in a manner which will bereadily obvious without a more explicit description. As the plug isturned in to compress the ring E and pack 8o the tube, as described, thesleeve K will be forced downwardly in the chamber x, said sleevepreventing the ring from coming in contact with the coupling. Thefollower being of the same diameterof the sleeve, and S5 the sleevefitted to work loosely in the coupling, it will be obvious that when thecoupling is removed from the nipple and the plug unscrewed from thecoupling the sleeve, packing ring, follower, and tube may be readilyrego moved from the coupling.

Having thus explained my invention, what' l. In a device for packingglass oage-tubes, the coupling O, sleeve K, follower J, packingring E,and plug D, combined and arranged to operate substantially as described;

2. In a device for packing glass gage-tubes, the combination of the tubeH, nipple B, coupling C, plug D, sleeve K, follower J, and roopaekingring E, constructed and arranged to a. plug, a sleeve,andagage-tnbe, Substantially operate substantially as set forth. asdescribed.

3. In a device for paekiiw lass 0aveftuloes T a coupling provided withinteir screw- XVILLIAM H' LRAX' 5 thread at either end, the interior ofthe coup- Vitnesses:

lingbetween the threaded portions being blank O. A. SHAW,

or Unthreaded, in combination with a nipple, L. J. VHITE.

